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Finding the Fourth Proportional to 112,603.67, 155,391.72 and 61,615.84

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Solution

The fourth proportional to 112,603.67, 155,391.72 and 61,615.84 is: 85,029.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,603.67 : 155,391.72 = 61,615.84 : x
  2. Step 2: Convert to fraction form
    112,603.67/155,391.72 = 61,615.84/x
  3. Step 3: Cross multiply
    112,603.67x = 155,391.72 × 61,615.84
  4. Step 4: Simplify right side
    112,603.67x = 9,574,591,028.67
  5. Step 5: Solve for x
    x = 9,574,591,028.67/112,603.67
  6. Step 6: Final answer
    x = 85,029.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.